The old herdsman must prevent the aliens are experimenting on his cows. To do so shall reject them by gunfire. Use arrows to move right and left. Use up arrow to take aim. Shoot with the space bar; two shoots are needed to destroy the alien craft. Go to the ammo's box to recharge.. Fight the evil aliens who want to catch your cows for their cruel experiments. Move towards them, take aim and shoot twice to destroy them before their light beam hooks your cows ... but watch out for ammo, remember to recharge when they finish!...